Belt-driven pulley clutch and brake



Patented Sept. 5, 1950 BELT-DRIVEN PULLEY CLUTCH AND BRAKE Victor H. Hasselquist, Akron, Ohio, assignor te The B. F, Goodrich Company, New York, N. Y., a corporation of New York v Application January 9, 1947-, Serial No. 721,123

18 Claims.

This invention relates to belt drives and espe-v cially to V-belt drives in which it is desirable to start and stop the driven member intermittently without stopping the driving member. In the operation of certain machines and machine tools, it is necessary to stop the motion of the mechanisms frequently, but it is desirable that the line shafts or motors continue to rotate as for instance when other mechanisms are driven by the same driving members.

v4'Objects of the invention are to provide an improved belt drive, to provide for coupling and uncoupling the driving and driven members, to provide for braking of the driven member, to provide for continued rotation of the driving member When it is not coupled to the driven member, to provide these results especially in azV-belt transmission, and to provide for simplicity in construction and eiciency of operation.

A further object is to provide through manipulation of a manually controlled member for coupling the driving and driven members when the brake is' released and uncoupling the members when the brake is applied.

These and other objects will be apparent from the'following description, reference being had to accompanying drawings in which:

Fig. 1 'is an elevation of apparatus embodying the invention, parts being broken away.

lFig., 2 is a section taken along line 2-2 of Fig. 1."

Fig. v3 is a view like Fig. 2 showing the belt in the idling position.

The drive of the illustrated embodiment of the invention comprises a driving member such as a shaft II mounted in a motor I2. A powertransmitting driven member such as shaft i3 is'mounted rotatably in a hanger I 4, which is mounted on a frame structure l5. A pair of radially extending elements such as flanges I5, I5,

arev mounted on the driven shaft i3 slidably in an" axial direction and are prevented from turnin'g relative to the shaft by a key I'iinserted in keyways I8 and I 9 in the shaft I3 and flanges I6, I I respectively. rihe anges I6, i6 have op,-

wf-posed conical faces 2l, 2l engageable with a V- belt 22'. The V-belt 22 is disposed between the flanges and about the driven shaft I3 and about a driving pulley 23 which is mounted fixedly on the driving shaft l I.

-Anarm member 25 is pivoted on a pin 26 the flanges I 6, I6 and urge them apart. l

-Tension springs 24, 24 are disposed between the flanges I6, I6 in axially extending passages therein and may be prevented from leaving the passages by retainingrings 26, 26 which are in@ serted through eyes at the end portions of the springs and bear against the end surfaces of the flanges I6, I6.

The arm member 25 is connected by a rod 28 to an arm member 29, which is pivoted on a pin 3l secured in brackets 32, which may be xed to the Hoor or to the frame structure I5. A pedal 33 is mounted on the arm member 29 for depresse crowned if desired, This pulley 36 is mounted" on the driven shaft I 3, and may be rotatable :'-ela-- tive to the shaft on anti-friction bearings such as ball bearings 3l, which are interposed between the shaft and the pulley. As shown in Fig. v2 the outside diameter of the Iianges I6, I6 is greater than the outside diameter of the idler pulley 36 and the conical faces 2l,'2I of the flanges extend from the idler pulley face to the outer edges of the anges I6, I6, The fianges I6, I6 are recessed at the portions adjacent the idler pulley 36 and have shoulders 38, 38 overhanging the" idler pulley in slightly spaced relation thereto to accommodate the outer edges of the idler pulley 36 without rubbing.

In operation, with the apparatus as shown in' Figs. 1 and 2, the V-belt 22 is in driving engagement withthedriving pulley 23 and with thel-v anges I6, I 6; The conical faces 2I, '2| of the flanges I5, i6 are urged against the V-.beltl 22'Y bythe springs 24 and urge the V-belt axially outward, maintaining tension upon the belt.

When the pedal 33 is depressed from the position Shown inv Fig. l, the rod 26 will move the.` arm member 25 towards the pulley 35, 36 and the wedge-shaped portion 2'! of the arm member 25 will move in the space between the flanges i6, f Iand urge the flanges apart. The friction be` 'j tween this wedge-shaped portion of the arm 25 1 and the flanges I 6, I6 vwill provide braking of the j ilanges and theV driven shaft I3 Y Depth of moveiment is limited by the shoulders 3U, 3l] which whenl pressed int-o engagement with the rim faces ofthe flanges I6, I6 will provide additional braking action. This parting of the anges will move'.

them away from the belt 22 as shown in Fig. 3,v

and the belt may then engage the idler pulley 36,

which will vrotate without lbeing affected by the rotation of the flanges or ofthe driven shaft I3.l f Thus, by depressing the pedal 33 the driven shaft pedal relative to v 3 I3 may be stopped while the belt 22 and driving shaft II continue to move.

the spring 34 will return the arm member 35 to the position shown in Fig. l, which is determined?? by the engagement of a setfscrew.- 35,.-fwith-the1 frame structure I5. Raising the arm member 25': will move the Wedge-shaped portionll of .theiarm-z 25 away from the flanges I 6;- I6 andallowfthere silient springs 24 to move one flange I6 toward the other. flanges I 6, I6 upon the belt 22 increases the friction between the belt sides and the sidesfofthef pulley. Also th-e conical faces 2|, 2| tend tol urge theebeltf awayffrom':tbefsidler-f'pulley' 36` andinacrease dthe `:tension lof".l the zbelts nas: they'convergefA This increasedf.- tension' andfrictionubetween the? beit?. flanges provides engagement;V b'etvveerr'.V the belt-:andv flanges:I I 6; I Siftorotate theifflanges: and the driven shaft I3.

It will be seenfrom-.thei foregoingthattheias; sembly is compaetiand;convenientlyfassembledi andwthatiit :provi-desea' cushionedxcltchingfaction under;y ready manual rf control'. of f theoperator:` Theeadvanta'ges cfa? Vabelttransmission:are?uti--A lizedfandffzinxfaddition Veffectivei;brakingaction is providz'ed';l Ther: clutchingj azndz. braking'- actions may;K beiY coordinatedathrough; simpler manipula; tien ofltherpedal.

Variations lmay.vv bef? made'. without departinga' from the scope of the inventionzaszit"isdefiied in'1thef1fol1owinggclaims;

1`.V A: transmissionii mechanism; comprisi-ng,Y a: rotatablefxiriving rmembergpa belt f-member, a? puleleyi'member. .ac driven. member comprising radi' allysextendingg elements coaxial: with andi dis= posedziatf. oppositeesidesf. of i said pulley members.

leye: members. said,d radially-'extending elements:

beings individually? moveablea along' the.j axis thereof;A means,` comprisingsam element mounted: substantiallynonmoveablycinithetdirection of the-f axisaamt moveablys'imtheradial directiorriofthefaxisiintofen'gagementiwith thefopposing faces'ofg:

saderadizallygextendingjelementsfor shifting1-sada raxliallyextendingf: elements.: oirti' of engagement"A with? saidl belt; member? and.; means fori shifting.` said radially-extending elementsi into 1 engage mentswith. said/beltamember:

2am transmission: mechanisirfa comprising; asi rotatableedriving member: azbeltzmember; annui ley'member, ladriven member comprising: coaxial flanges.y disposed .at=.oppositefsides .off saidi pulleyv4 member, saidii flanges.- having opposedz` conical: faces for.` engagement. with said?. belt'and being; individually moveable.: along? the?Y axis:- thereof, means -comprisingfam'element mounted: substan-ztially nonnroveabl-y;v in-z the f direction of? the-=axisiv andi moveably in z the?` direction. of.. the: axis;-A into?. engagement. with: the.' opposing@ faces; of saidi flangesfor. shifting'l saidi. flangess outa ois engage ment.Lwithsaid,.beltimember. andfonmoving said;- beltmember radially. inwardfwithrespect tdsaidi pulley, and .means for.: shifting` Saidflanges.. intein engagement withv saidlb'elt .members.,

35 A" transmission. mechanism comprising:y ai, rotatable driving memberg. a..v belt member, ai driven" idler.l pulleyl memben, a. driven..power.

transmittingmember"comprisinga pair of flanges#v The converging 1 movement; of..v the .4 driving member and the flanges of said driven power-transmitting member, and resilient means frrurgingsaidflanges togetherfan'dffmeans comprising 'an' element mounted moveably 'in the radial direction of the axis into and out of engagement with said flanges for urging said flanges apart..-

4. A transmission mechanism comprising a rotatablef driving? member, a belt member, a

driven4k idler pulley-f member, a driven powertransmitting member..comprising,alpair'offlangs disposed at opposite sides" s of. saidf': pulley?. sstd flanges -beingfmnvabl axially relative-to eacha other;` and.' having" opposed.y conical Y faces forrene` gagement'fWithsaidoeltf.membersaid beli'fn'lerme` f :gberbeing engageabieA with saidfdrivingfmemberz and' saidi` driven'.A members, resilient means: fon urging` said.' flanges: together; and: means@ fox?.1 urging saidflanges apart vandrf or .fsimultaneouslw resisting... rotation of said' flanges: v comprisingm member movable. radial-ly.r between, saidiflanges.`v

6:.A.. transmission'. mechanism-r comprising?, aa rotatable' driving-1" member; a? belt.r membergam idler` pulley' member;l a'. ,drivers powers-transmite. ting member comprising afpainofflangesfat .opge posite: sidesand?, coaxial1y witlr said'iidler.A pulley member; said` flanges ."beingizntovable findividually along the axisfth'ereof; `said:beltzmemberrbeings engageable'withrsaidvidler' ypulley -member Aat the innermost peripheral surface? of n the belt zmeme ber andi being engageable with@ said; flanges-S` at the sides of said belt member, means comprisini an'. element `mounted moveably -inifthep radial :die rection of the axis into and outofeengagementt with -thebeltengagingggfaces ofesaid flangessfnr I- moving: saidrflanges fapart andfmeanssforimovinxg saidflanges towardeach other: y

7. belt-.driven transmissionf comprising; aa

shaft, a: pairaof.flanges mounted=slidably= imam axial directionl oirsaid'shaft; anidler pulleycmema ber l.mounted,rotatably onsaid .shaftfand-.betweem saldi fiangea. resilientv means..w forL urging?. saldi?. flanges together.y and-.means forAA simultaneously.; urging Y said e flanges apart .and resisting., rotatiom thereof..

8. A- transmission... mechanism comprisir'igll ai rotatable fdrivinggmember; aibeltmember, appli.- leymember, a drivenanemberycomprising coaxi. flanges disposediateopposite -sides of; saidlpullew memben. said.' flanges? having opposed conical faces for engagement with said.belt-..and..bein&

shiftable axially. relative.. toasaid-pulley member',A said .flangesiandnsaidlnpulley,Y member having paran sages.. extending., axially, therethrongh,. resilientt meansdisposedin .saidpassagessfon urging-Saleh flangestoward Aeacl'i other; .and means -fonurgingg saldi flanges apart` including.Y a. nonerotatablea Wedge: shaped-member. movableradially betweem saidangesaand.having.tapered sidesfin lsprearl` ing engagement.with.-saidfflanges;l

9;.A. transmissiorri mechai'iism-1 comprisnlr; 8f

rotatable driving member, a belt member, a pulley member, a driven member comprising coaxial anges disposed at opposite sides of said pulley member, said flanges having opposed conical faces for engagement with said belt and being individually moveable along the axis thereof, said flanges and said pinley member having passages extending axially therethrough, springs disposed in said passages for urging said flanges together, retaining rings secured to the end portions of said springs and disposed at the outer ends of said flanges, and means comprising an element mounted substantially nonmoveably in the direction of the axis and moveably in the radial direction of the axis into and out of engagement With the conical faces of said flanges for urging said flanges apart.

10. A transmission mechanism comprising a rotatable driving member, a belt member, a pulley member, a driven member comprising coaxial ilanges disposed at opposite sides of said pulley member, said flanges having opposed conical faces for engagement with said belt and being recessed to accommodate end portions of said pulley member for free relative movement, said flanges being individually moveable along the axis thereof, said pulley member having a passage extending therethrough, resilient means for urging said flanges together including a coil spring, means securing said spring to said flanges, and means comprising an element mounted substantially nonmoveably in the direction of the axis and moveably in the radial direction of the axis into and out of engagement with the conical faces of said flanges for urging said flanges apart.

11. A transmission mechanism comprising a rotatable driving member, a belt member, a driven member comprising a pair of coaxial flanges having opposed conical faces and mounted for movement axially relative to each other, said belt member being engageable with said driving member and with said driven member, means for urging said flanges together and means engageable with said opposed conical faces for urging said flanges apart and for simultaneously resisting rotation of said flanges.

12. A transmission mechanism comprising a rotatable driving member, a belt member, a driven power-transmitting member comprising a pair of coaxial flanges having opposed faces, at least one of said nanges being movable axially relative to the other, said belt member being engageable with said driving member and with said driven members, means for urging said flanges together and means engageable with said opposed faces of said flanges for urging said flanges apart and for simultaneously resisting rotation of said flanges.

13. A transmission mechanism comprising a rotatable driving member, a belt member, a driven member comprising a pair of coaxial flanges having opposed faces and mounted for movement axially relative to each other, said belt member being engageable with said opposed faces of said flanges, means for urging said flanges together, and means for urging said flanges apart and for simultaneously resisting rotation of said anges comprising a member movable against said flanges and having tapered sides in spreading engagement With said flanges.

14. A transmission mechanism comprising a rotatable driving member, a belt member,v a

driven member comprising a pair of coaxial flanges having opposing conical faces and mounted for movement axially relative to each other said belt member being engageable with said driving member and said driven member, means for urging said flanges together, means for urging said flanges apart and for simultaneously resisting rotation of said flanges comprising a member movable radially against said opposing conical faces of said flanges.

15. A belt-driven transmission comprising an idler pulley member, a pair of flanges coaxial with said pulley member and disposed at the sides of said pulley member, each of said flanges being individually moveable along the axis thereof, means for urging said flanges together and into driving engagement with the belt and flange spreading means comprising a radially moveable element engageable with opposing faces of said flanges for urging said flanges apart and out of driving engagement with the belt.

16. A belt-driven transmission comprising an idler pulley member, a pair of flanges coaxial with said pulley member and disposed at the sides of said pulley member, said flanges being individually moveable along the axis thereof, means for urging said flanges together and means comprising an element mounted substantially nonmoveably in the direction of the axis and moveably in the radial direction of the axis into and out of engagement with said flanges for urging said flanges apart.

1'?. A belt-driven transmission comprising a shaft, a pair of flanges mounted slidably in an axial direction on said shaft, an idler pulley member mounted rotatably on said shaft and between said flanges, means for urging said flanges together and means comprising an element mounted moveably in the radial direction of the axis into and out of engagement With said flanges for simultaneously urging said anges apart and resisting rotation thereof.

18. A beltdriven transmission comprising a shaft, a pair of flanges mounted slideably for independent movement in an axial direction on said shaft, an idler pulley member mounted rotatably on said shaft and between said flanges, means for urging said flanges together and flange spreading means comprising a non-rotatable, wedge-shaped element mounted substantially nonmoveably in the direction of the axis and moveably in the radial direction of the axis into and out of engagement with said flanges for urging said flanges apart.

VICTOR H. HASSELQUIST.

CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS Number Name Date 1,912,912 Prather Dec. 26, 1911 1,274,891 Jones Aug. 6, 1918 2,008,992 Oak July 23, 1935 2,254,592 Berkeley Sept. 2, 1941 2,256,312 Cregier Sept. 16, 1941 2,259,149 Cederstrom Oct. 14, 1941 2,369,681 Miles Feb. 20, 1945 FOREIGN PATENTS Number Country Date 202,332 Great Britain Aug. 13, 1923 557,884 France Aug. 1'7, 1923 

